Page 897 of 1807

AB0117 AB0118 AB0119W02763
H00049
LOCK
Airbag Sensor Assembly
TcACC
ON
or
DI-606
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
834 Author: Date:
1997 SUPRA (RM502U)
4 Check airbag sensor assembly.
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Disconnect negative (-) terminal cable from the battery,
and wait at least 90 seconds.
(c) Remove the steering wheel pad. (See SR section)
(d) Disconnect the connector of front passenger airbag as-
sembly. (See page RS-21)
(e) Disconnect the connector of airbag sensor assembly.
(See page RS-33)
(f) Insert the service wire into terminal Tc from back side as
shown.
(g) Connect the airbag sensor assembly connector with ser-
vice wire.
(h) Connect negative (-) terminal cable to battery.
(i) Turn the ignition switch to ACC or ON, and wait at least
20 seconds.
(j) Connect the service wire of terminal Tc to body ground.
CHECK:
Check operation of SRS warning light.
OK:
SRS warning light comes on.
NOTICE:
Never make a mistake with the terminal connection posi-
tion as this will cause a malfunction.
OK Check harness between airbag sensor assem-
bly and DLC1.
NG
Replace airbag sensor assembly.
Page 898 of 1807
AB0117
W02764H00050
LOCK
Airbag Sensor Assembly
(-)Tc
(+)
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-607
835 Author: Date:
1997 SUPRA (RM502U)
If the DTC is displayed without a DTC check procedure, perform the following
troubleshooting.
1 Check resistance between terminal Tc of airbag sensor assembly and body
ground.
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Disconnect negative (-) terminal cable from the battery,
and wait at least 90 seconds.
(c) Disconnect the airbag sensor assembly connector.
CHECK:
Check the resistance between terminal Tc of airbag sensor as-
sembly connector and body ground.
OK:
Resistance: 1 MW or higher
NG Repair or replace harness or connector.
OK
Replace airbag sensor assembly.
Page 899 of 1807

DI4WV-01
Customer Problem Analysis
Vehicle Brought to Workshop
Problem Symptom ConfirmationSymptom Simulation Probkem does not occur
Matrix Chart of Problem Symptoms
Circuit Inspection
Identification of Problem
Repair
Confirmation Test
EndTitles inside
are titles of pages in this
manual, with the page number indicated in
the bottom portion. See the indicated pages
for detailed explanations. 1
23
4
5
7
Step 5, 7 : Diagnostic steps permitting the use
of the TOYOTA hand-held tester or
TOYOTA break-out-box. P. DI-609
P. DI-615
P. IN-18
P. DI-617
Problem occurs
6
DI-608
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
836 Author: Date:
1997 SUPRA (RM502U)
THEFT DETERRENT SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
Troubleshooting of the theft deterrent system is based on the premise that the door lock control system is
operating normally. Accordingly, before troubleshooting the theft deterrent system, first make certain that
the door lock control system is operating normally.
For troubleshooting using a volt/ohm meter, see page DI-615.
Be sure to use troubleshooting procedure appropriate to the diagnostic tool being used.
Perform troubleshooting in accordance with the procedure on the following page.
Page 900 of 1807

DI4WW-01
THEFT DETERRENT SYSTEM Check Sheet
Inspector 's name:
Customer 's Name
Date of VehicleRegistration No.
Registration Year
Frame No.
Odometer Reading / /km
Mile
Weather Conditions
When Problem
Occurred Frequency Problem OccursWeather
Outdoor temperature
/ /
Constant Sometimes ( Times per day, month)
Once only Brought in
Theft deterrent system cannot be set.
Indicator light does not flash when the theft deterrent system is set.
(It stays on or does not light at all.)
Theft deterrent system
does not operate. When unlocked using the
door lock knob.
When the engine hood is
opened.
System cannot be
canceled once set. When door is unlocked using key or wireless door lock control system.
When the key is inserted in the ignition key cylinder and turned to ACC or ON
position.
(However, only when the system has never operated)
When the luggage compartment door is opened with the key.
System cannot be
canceled during warning
operation. When door is unlocked using key or wireless door lock control system.
When the key is inserted in the ignition key cylinder and turned to ACC or ON
position.
Warning operation starts when the system is set and the door or luggage compartment door is opened with
the key.
Others.
Date Problem First Occurred
Fine Cloudy Rainy Snowy
Various/Others
Hot Warm Cool
Cold (Approx. 5F ( 5C))
Problem Symptom
Malfunction
Horns only
Theft deterrent horn only
Headlights only
Taillights only
Starter cut only
Door lock operation only
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-609
837 Author: Date:
1997 SUPRA (RM502U)
CUSTOMER PROBLEM ANALYSIS CHECK
Page 901 of 1807

DI4WX-01
DI-610
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
838 Author: Date:
1997 SUPRA (RM502U)
PRE-CHECK
1. Setting Conditions:
SETTING OF THE THEFT DETERRENT SYSTEM
(a) Close all the doors.
(b) Close the engine hood and luggage compartment door.
(c) Remove the ignition key from the ignition key cylinder.
2. Setting Operation:
SETTING OF THE THEFT DETERRENT SYSTEM
When any of the following operations (a) or (c) is done, the theft deterrent indicator light will light up as de-
scribed.
(1) Lock the left or right front door using the key. (All doors are locked by key-interlinked lock opera-
tion)
(2) With the rear doors locked and with one of the front doors locked, lock the other front door without
using the key (keyless door lock).
Elapsed time after operationIndicator light
Within about 30 secondsLight up
After about 30 secondsBlinks *1
*1: 1 sec. on, 1 sec. off
HINT:
When the theft deterrent system is set, doors cannot be locked or unlocked with the door lock control switch
and the luggage compartment door cannot be unlocked with the luggage compartment door opener switch.
3. Cancelling Operation:
CANCELING OF THE THEFT DETERRENT SYSTEM IN THE SET CONDITION
HINT:
Check if the theft deterrent indicator light is blinking.
When any of the following operation (a), (b), (c) or (d) is done, the theft deterrent system is canceled
and indicator light will go off.
(a) Unlock the left or right front door using the key.
(b) Insert the ignition key in the ignition key cylinder and turn it to the ACC or ON position. (This is operative
only when the theft deterrent system has never operated.)
(c) Unlock the luggage compartment door with the key. *
1
*1: The theft deterrent systems is temporarily canceled only while the luggage compartment door is open.
Approximately 2 seconds after the luggage compartment door is closed, the theft deterrent system is reset.
Page 902 of 1807

N09348
TOYOTA
hand-held tester
TOYOTA
break-out-boxECU
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-61 1
839 Author: Date:
1997 SUPRA (RM502U)
4. CHECK OF THE THEFT DETERRENT SYSTEM OPERATION.
HINT:
Check if the theft deterrent indicator light is blinking.
When any of the following operations (a) or (b) is done, the system sounds the horns as theft deterrent horn
and flashes the headlights and taillights for about one minute to alert. At the same time, the system discon-
nects the starter motor circuit and locks all doors (if all doors are not locked, the system repeats door locking
operation every 2 seconds during the one minute alert time).
(a) Open the engine hood using the engine hood opener lever.
(b) Unlock any of the front or rear doors without key operation.
5. CANCELING OF THE THEFT DETERRENT SYSTEM IN OPERATING CONDITION.
The theft deterrent operation can be cancelled when any of the following conditions is met:
No.ConditionCancelling Operation
1Unlock left or right door with the key.
2Unlock doors with wireless door lock control system.
3Insert key into ignition key cylinder and turn it to the ACC or ON position.*2
4About 1 minute passes after theft deterrent operation begins.Automatic stop*1
*1: In this case, the theft deterrent system resets in about 2 seconds if all doors are closed.
*
2: The alarm will be off, but the engine will not operate. To restart the engine, see No.1
6. ECU TERMINAL VALUES MEASUREMENT USING
TOYOTA BRAKE-OUT-BOX AND TOYOTA HAND-
HElD TESTER
(a) Hook up the TOYOTA brake- out- box and TOYOTA
hand-held tester to the vehicle.
(b) Read the ECU input/output values by following the
prompts on the hand-held tester screen.
HINT:
TOYOTA hand-held tester has a ºSnapshotº function. This re-
cords the measured values and is effective in the diagnosis of
intermittent problems.
Please refer to the TOYOTA hand-held tester/TOYOTA break-
out-box operator's manual for further details.
Page 903 of 1807
DI4WY-01
I02535
Theft Deterrent Horn
R/B No.2
Headlight Relay
Horn Relay
Starter Relay
Engine Hood Courtesy
Switch
HornTheft Deterrent Horn
(2JZ-GTE)
(2JZ-GE)
Theft Deterrent and Door
Lock ECU
Door Key Lock and Unlock
Switch
Door Lock Control Switch
Door Lock Motor and Door Unlock
Detection Switch
Door Courtesy SwitchLuggage Room Light Switch Door Key Lock and Unlock
Switch Door Lock Control Switch
Back Door Key Unlock Switch
(Power Window Master Switch)
DI-612
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
840 Author: Date:
1997 SUPRA (RM502U)
PARTS LOCATION
Page 904 of 1807

DI4WZ-01
I02536
3
25 21
976411
10
24 23 18 85
22 21 2019 17 16 15 14 13 12 98 7
65432 1 T13
T7
Theft Deterrent and Door Lock Control ECU
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-613
841 Author: Date:
1997 SUPRA (RM502U)
TERMINALS OF ECM
TerminalsSymbolsConditionStandard Value
+B2 e Ground
(T7-9 eGround)L-W e GroundAlways.10 - 14 V
ACT- e ACT+ (T7-2 eT7-3)L-Y e L-RIgnition switch is turned to ºOFFº position.Below 50W
RLY e Ground
(T7-6 eGround)Y e GroundIgnition switch is turned to ºONº position.10 - 14 V
IG e Ground
(T7-7 eGround)B-R e GroundIgnition switch is turned to ºONº position.10 - 14 V
ACC e E (T7-8 eT7-4)L-Re W-BIgnition switch is turned to ºACCº position.10 - 14 V
+B1 e Ground
(T13-1 eGround)R e GroundAlways.10 - 14 V
DSWLE (T13 4T7 4)LGWBLuggage compartment door courtesy switch ON (door opened).Below 1 WDSWL e E (T13-4 e T7-4)LG e W-BLuggage compartment door courtesy switch OFF (door closed).1 MW or higher
L1E (T13 5T7 4)RWWBDoor lock control switch ºlockº position.Below 1 WL1 e E (T13-5 e T7-4)R-W e W-BDoor lock control switch OFF or ºunlockº position.1 MW or higher
UL3E (T13 6T7 4)GWBDoor key lock and unlock switch ºunlockº position.Below 1WUL3 e E (T13-6 e T7-4)G e W-BDoor key lock and unlock switch OFF or ºlockº position.1MW or higher
DSWDE (T13 7T7 4)RBWBDoor open detection switch (driver's) ON (door opened).Below 1WDSWD e E (T13-7 e T7-4)R-B e W-BDoor open detection switch (driver's) OFF (door closed).1MW or higher
UL1E (T13 8T7 4)GRWBDoor lock control switch ºunlockº position.Below 1WUL1 e E (T13-8 e T7-4)G-R e W-BDoor lock control switch OFF or ºlockº position.1MW or higher
LUGE (T13 9T7 4)LWBLuggage compartment door key lock and unlock switch ON.Below 1WLUG e E (T13-9 e T7-4)L e W-BLuggage compartment door key lock and unlock switch OFF.1MW or higher
HEAD e E (T13-10eT7-4)R-Y e W-BLight control switch other than ºHEADº position.10 - 14 V
SH e E (T13-11 eT7-4)P-B e W-BAlways.10 - 14 V
IND e Ground
(T13-12 e Ground)W-L e GroundAlways.Below 270 W
DSWHE (T13 14T7 4)GRWBEngine hood courtesy switch ON (hood opened).Below 1WDSWH e E (T13-14 e T7-4)G-R e W-BEngine hood courtesy switch OFF (hood closed).1MW or higher
LSWDE (T13 15T7 4)LWWBDoor unlock detection switch ON (door opened).Below 1WLSWD e E (T13-15 e T7-4)L-W e W-BDoor unlock detection switch OFF (door closed).1MW or higher
UL2E (T13 16T7 4)WWBDoor key lock and unlock switch ºunlockº position.Below 1WUL2 e E (T13-16 e T7-4)W e W-BDoor key lock and unlock switch OFF or ºlockº position.1MW or higher
DSWPE (T13 19T7 4)RLWBDoor open detection switch (passenger's) ON (door opened).Below 1WDSWP e E (T13-19 e T7-4)R-L e W-BDoor open detection switch (passenger's) OFF (door closed).1MW or higher
KSWE (T13 20T7 4)YWBKey unlock warning switch ON.Below 1WKSW e E (T13-20 e T7-4)Y e W-BKey unlock warning switch OFF.1MW or higher